The first section of the Dunedin Tunnels Trail is officially open

It runs 1.5 kilometres along a disused rail alignment, through regenerating native bush and the historic Chain Hills Tunnel.

Dunedin Tunnels Trail Trust Chair Brent Irving says he couldn't be happier to be celebrating the milestone, which has been been many years in the making.

He says the goal is to eventually extend the trail through to Dunedin, providing a scenic and safe route from the city to the Taieri for commuting and recreational riders and walkers.